HooDooProof crates?

Having an issue with crates on the battlefield in the Flooded Tunnels in Gold mine. If they are targeted with any HooDoo attack from myself or Old Scratch, they will show the target dot on them. The attack animation will go through, the talent will be used, but the crates remain unharmed. Also, if the crate was the target in an area hoodoo wand attack, any enemies that fall in the target area will not be hit either, though they will show a targeted dot and the animation will play through. I can only destroy them with a melee or gun attack. Is it supposed to be that way?